On 10/09/2018 02:08 AM, Nicholas D Steeves wrote: > On Mon, Oct 08, 2018 at 04:10:55PM +0000, Hugo Mills wrote: >> On Mon, Oct 08, 2018 at 03:49:53PM +0200, Pierre Couderc wrote: >>> I ma trying to make a "RAID1" with /dev/sda2 ans /dev/sdb (or similar). >>> >>> But I have stranges status or errors about "missing devices" and I >>> do not understand the current situation : > [...] >> Note that, since the main FS is missing a device, it will probably >> need to be mounted in degraded mode (-o degraded), and that on kernels >> earlier than (IIRC) 4.14, this can only be done *once* without the FS >> becoming more or less permanently read-only. On recent kernels, it >> _should_ be OK. >> >> *WARNING ENDS* > > I think this was the patch that addressed this?: > https://www.spinics.net/lists/linux-btrfs/msg47283.html > https://patchwork.kernel.org/patch/7226931/ > > In my notes it wasn't present in <= 4.14.15, but my notes might be > wrong. Does this patch resolve the one-shot -o degraded, reboot, > forever read-only behaviour, or is something else required? When was > it merged? Has it been or will it be backported to 4.14.x? I'm > guessing 4.9.x is too far back, but it would be really nice to see it > there too :-) > > Also, will this issue be resolved for linux-4.19? If so I'd like to > update the Debian btrfs wiki with this good news :-)
[...] > P.S. Please let me know if you'd prefer for me to shift this > documentation effort to btrfs.wiki.kernel.org. Yes, absolutely. This is not specific to how we do things for Debian. Upstream documentation can help all distros. -- Hans van Kranenburg
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